1/*
2 * Copyright (c) 1997-2004 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "ktutil_locl.h"
35
36RCSID("$Id: copy.c 14260 2004-09-23 14:45:29Z joda $");
37
38
39static krb5_boolean
40compare_keyblock(const krb5_keyblock *a, const krb5_keyblock *b)
41{
42    if(a->keytype != b->keytype ||
43       a->keyvalue.length != b->keyvalue.length ||
44       memcmp(a->keyvalue.data, b->keyvalue.data, a->keyvalue.length) != 0)
45	return FALSE;
46    return TRUE;
47}
48
49static int
50kt_copy_int (const char *from, const char *to)
51{
52    krb5_error_code ret;
53    krb5_keytab src_keytab, dst_keytab;
54    krb5_kt_cursor cursor;
55    krb5_keytab_entry entry, dummy;
56
57    ret = krb5_kt_resolve (context, from, &src_keytab);
58    if (ret) {
59	krb5_warn (context, ret, "resolving src keytab `%s'", from);
60	return 1;
61    }
62
63    ret = krb5_kt_resolve (context, to, &dst_keytab);
64    if (ret) {
65	krb5_kt_close (context, src_keytab);
66	krb5_warn (context, ret, "resolving dst keytab `%s'", to);
67	return 1;
68    }
69
70    ret = krb5_kt_start_seq_get (context, src_keytab, &cursor);
71    if (ret) {
72	krb5_warn (context, ret, "krb5_kt_start_seq_get %s", keytab_string);
73	goto out;
74    }
75
76    if (verbose_flag)
77	fprintf(stderr, "copying %s to %s\n", from, to);
78
79    while((ret = krb5_kt_next_entry(context, src_keytab,
80				    &entry, &cursor)) == 0) {
81	char *name_str;
82	char *etype_str;
83	ret = krb5_unparse_name (context, entry.principal, &name_str);
84	if(ret) {
85	    krb5_warn(context, ret, "krb5_unparse_name");
86	    name_str = NULL; /* XXX */
87	}
88	ret = krb5_enctype_to_string(context, entry.keyblock.keytype, &etype_str);
89	if(ret) {
90	    krb5_warn(context, ret, "krb5_enctype_to_string");
91	    etype_str = NULL; /* XXX */
92	}
93	ret = krb5_kt_get_entry(context, dst_keytab,
94				entry.principal,
95				entry.vno,
96				entry.keyblock.keytype,
97				&dummy);
98	if(ret == 0) {
99	    /* this entry is already in the new keytab, so no need to
100               copy it; if the keyblocks are not the same, something
101               is weird, so complain about that */
102	    if(!compare_keyblock(&entry.keyblock, &dummy.keyblock)) {
103		krb5_warnx(context, "entry with different keyvalue "
104			   "already exists for %s, keytype %s, kvno %d",
105			   name_str, etype_str, entry.vno);
106	    }
107	    krb5_kt_free_entry(context, &dummy);
108	    krb5_kt_free_entry (context, &entry);
109	    free(name_str);
110	    free(etype_str);
111	    continue;
112	} else if(ret != KRB5_KT_NOTFOUND) {
113	    krb5_warn (context, ret, "%s: fetching %s/%s/%u",
114		       to, name_str, etype_str, entry.vno);
115	    krb5_kt_free_entry (context, &entry);
116	    free(name_str);
117	    free(etype_str);
118	    break;
119	}
120	if (verbose_flag)
121	    fprintf (stderr, "copying %s, keytype %s, kvno %d\n", name_str,
122		     etype_str, entry.vno);
123	ret = krb5_kt_add_entry (context, dst_keytab, &entry);
124	krb5_kt_free_entry (context, &entry);
125	if (ret) {
126	    krb5_warn (context, ret, "%s: adding %s/%s/%u",
127		       to, name_str, etype_str, entry.vno);
128	    free(name_str);
129	    free(etype_str);
130	    break;
131	}
132	free(name_str);
133	free(etype_str);
134    }
135    krb5_kt_end_seq_get (context, src_keytab, &cursor);
136
137  out:
138    krb5_kt_close (context, src_keytab);
139    krb5_kt_close (context, dst_keytab);
140    return ret != 0;
141}
142
143int
144kt_copy (void *opt, int argc, char **argv)
145{
146    return kt_copy_int(argv[0], argv[1]);
147}
148
149int
150srvconv(struct srvconvert_options *opt, int argc, char **argv)
151{
152    char kt4[1024], kt5[1024];
153
154    snprintf(kt4, sizeof(kt4), "krb4:%s", opt->srvtab_string);
155
156    if(keytab_string != NULL)
157	return kt_copy_int(kt4, keytab_string);
158
159    krb5_kt_default_modify_name(context, kt5, sizeof(kt5));
160    return kt_copy_int(kt4, kt5);
161}
162
163int
164srvcreate(struct srvcreate_options *opt, int argc, char **argv)
165{
166    char kt4[1024], kt5[1024];
167
168    snprintf(kt4, sizeof(kt4), "krb4:%s", opt->srvtab_string);
169
170    if(keytab_string != NULL)
171	return kt_copy_int(keytab_string, kt4);
172
173    krb5_kt_default_name(context, kt5, sizeof(kt5));
174    return kt_copy_int(kt5, kt4);
175}
176